How to Fix Excel Solver Run-Time Error 453 Missing DLL Entry Point
Question details
The user is experiencing Run-time error 453 when attempting to start the Excel Solver add-in, caused by a missing DLL entry point.
- Product
- Microsoft Excel 365
- Device & OS
- Windows
- Scenario
- Attempting to launch the Solver add-in for data analysis and optimization within a Microsoft Excel workbook.
- Observed behavior
- Excel Solver fails to launch and displays 'Run-time error 453: Can't find DLL entry point MessageBoxIndirectW in user32' or similar kernel32 errors. Standard troubleshooting like reinstalling Office or toggling the add-in does not resolve it.
Ensure you have administrative privileges on your Windows computer, as troubleshooting system-level DLL conflicts requires permissions to modify startup configurations and user accounts.
Perform a Windows Clean Boot
A clean boot starts Windows with a minimal set of drivers and startup programs. This helps identify if a background application or third-party software is conflicting with the Excel Solver add-in.
Software conflicts are a common cause of DLL entry point errors in Microsoft Office. By isolating the operating system from non-essential services, you can verify if an external application is blocking Solver from loading its necessary resources.
Press the Windows key + R to open the Run dialog. Type 'msconfig' into the text box and press Enter to launch the System Configuration utility.
Navigate to the 'Services' tab. Check the box at the bottom left that says 'Hide all Microsoft services'. This ensures you do not disable essential operating system functions.
Click the 'Disable all' button to turn off the remaining non-Microsoft services listed in the window.
Go to the 'Startup' tab and click 'Open Task Manager'. In Task Manager, select each enabled startup item one by one and click 'Disable'.
Close Task Manager, return to the System Configuration window, click 'Apply', and then 'OK'. Restart your computer and try opening Excel Solver again.
Create a New Windows User Profile
If a clean boot does not resolve the error, your current Windows user profile or its registry settings might be corrupted, preventing Excel from accessing user32.dll correctly.
Use WPS Office as a Reliable Alternative for Data Analysis
If Microsoft Excel continues to experience Run-time error 453 and DLL entry point issues that disrupt your workflow, consider switching to WPS Office. It is a highly compatible, free suite that provides robust spreadsheet capabilities without the heavy system conflicts.
- 1. Download WPS Office: Visit the official WPS website to download and install the free, lightweight WPS Office suite on your Windows PC.
- 2. Open Your Spreadsheet: Launch WPS Spreadsheets and open your existing .xlsx workbook directly. Your data, formulas, and formatting will load perfectly.
- 3. Analyze Your Data: Navigate to the Data tab to access built-in calculation and analytical tools to continue your work without encountering runtime errors.
Frequently Asked Questions
What causes Run-time error 453 in Excel Solver?
This error typically occurs when Excel cannot locate specific DLL entry points, such as MessageBoxIndirectW in user32.dll or GetDllDirectoryA in kernel32.dll. This is usually caused by third-party software conflicts, corrupted add-in files, or a damaged Windows user profile.
Where is the solver32.dll file located on Windows?
By default, the Solver add-in files for Microsoft 365 are located in the Office installation directory, typically found at C:\Program Files\Microsoft Office\root\Office16\Library\SOLVER.
How can I disable and re-enable the Solver add-in in Excel?
Go to File > Options > Add-ins. At the bottom of the window, ensure 'Excel Add-ins' is selected in the Manage dropdown and click 'Go'. Uncheck the box for 'Solver Add-in', click OK, restart Excel, and repeat the process to check the box and re-enable it.
